title: Relative shear bond strength and microleakage of two dentine bonding agents.
abstract: We determined the relative shear bond strength (SBS) to dentine and cementum and the microleakage of All-Bond 2 universal dental adhesive and OptiBond multi-use filled adhesive. We found that for both systems the SBS increased significantly (p < 0.001) from 15 minutes to 24 hours and 7 days, but there was a slight significant (p < 0.001) weakening towards 30 days. At each time point the shear bond strength of All-Bond 2 and OptiBond were also compared and it was found that OptiBond had significantly higher values (p < 0.05) at all times except at 15 minutes. Optibond also had the lower value for the microleakage (p < 0.001). This study showed that OptiBond had significantly higher shear bond strengths to and lower microleakage in dentine which may increase the longevity of the material in the clinical situation.
authors.affiliation: Oral and Dental Research Institute, University of Stellenbosch, Faculty of Dentistry, Tygerberg.
authors.forename: S R
authors.initials: SR
authors.lastname: Grobler
authors.forename: R J
authors.initials: RJ
authors.lastname: Rossouw
authors.forename: T J
authors.initials: TJ
authors.lastname: van Wyk Kotze
authors.forename: I J
authors.initials: IJ
authors.lastname: du Toit
mesh_terms: D003763:Dental Leakage / Q000517:prevention & control*; D003804:Dentin / Q000187:drug effects / Q000648:ultrastructure; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing / Q000379:methods; D008689:Methacrylates / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008963:Molar / Q000187:drug effects / Q000648:ultrastructure; D019279:Resin Cements / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D017220:Dentin-Bonding Agents; D008689:Methacrylates; C092987:Optibond; D019279:Resin Cements; C100742:All-Bond 2